On September 3rd of 2019, Random House will release what is likely the very last Dr. Seuss book there'll ever be: Dr. Seuss's Horse Museum. The work, initially just a manuscript and pile of incomplete sketches, was found buried in a box in the late author's California home in 2013. Since then, artists intimately familiar with Seuss's style of drawing have managed to fill in the gaps and finish the book.